
How old is he?
When a dog isn't wanting to eat and there is no obvious reason I start wondering is it constipated and/or in the case of young pups full of worms.
Is he pooing normally ie colour,consistancy and frequency and when was he and Mum[as she is still feeding him]last wormed, has there been signs of worms in the past?
As he is still acting normally then hopefully it isn't anything too serious. Is he still vomiting or was that just a one off episode and when in relation to last eating did it happen?
Sorry for all the questions but te answers may help me or someone ese come up with suggestions.
A trip to the vet may be needed tomorrow if he is no better.